Thomas van aernam



(No Model.)

T. VAN AERNAM. WBAR PLATE F'o WAGON BoLsTERs.

No.- 270,918. Patented JM1.Q18 83.l

UNITEDY STATES Parlava* FFICE.

THOMAS VAN AER-NAM, OF ALBANY, NEYV YORK.

WEA R-PLATE FOR WAGON-BOLSTERS.

SPECIFICATION forming part of Letters Patent No. 270,918, dated January23, 1883l Application filed October 13, 1882. (No model.)

To all 'whom it may concern Be it known that l, THOMAS VAN AERNAM,

a. citizen ot' the United States,'and a resident of the city and countyof Albany, in the State ot' New York, have invented new and usefulImprovements in Wear-Plates for Bolsters of Sand and other Wagons, otlwhich the following is a specification.

My invention relates to wear-plates for bol sters of sand and otherwagons in which the upper and lower wear plates are made of chilled ironon their wearing sides, and combining the elements 0r deviceshereinafter more particularly set forth and described.

The. object ot my'invention is to provide wear-plates for holsters andaxles of wagons, which will have their wearing-surfaces ofchilled iron,capable of reducing the friction to a minimum as compared with thesoft-iron plates heretofore employed, and which will also have achillediron circular engaging projection and recess made solid therewithabout their kingbolt holes for relieving the king-bolt from strain,lalsoincreasing the vertical length of the king-bolt holes in said plates,and relieving the strain of the plates on the attaching bolts and clips.I attain tliisjobject by means of the devices and elements illustratedin the accompanying drawings, in which similar letters of referencerefer to similar parts throughout the several views. A

In the drawings, Figure l represents a plan view of the axlewear-plates; Fig. 2, a plan view of the bolster wear-plates; Fig. 3 is across-sectional view of said plates when conjoined and secured to theirrespective parts of the wagon. Fig. 4 is a sectional elevation of thesaine.

Inthe drawings, A represents the axle of the wagon,` and B the bolster.Heretofore it has been the practice to make wear-plates between saidaxle and bolster of soft wroughtiron and of uniform thicknessthroughout, with holes made central in the same for receiving king-boltsof large diameter. These old forms of plates were secured from shiftingon their respective parts of wagon by bolts or clips. The greatdisadvantages attending the use of said old form of wear-plates weretheir excessive friction, which would' cause them` to wear rapidly away,so as to reduce the vertical length of theking-bolt holes, and therebycause the king-bolt to be rapidly cut at-about -its center of length,while at the sametime this excessive friction would impose greater laboron the animals when turning the fore part ol' the Wagon. The excessiveenlargement of the king-bolt holes and lessening of the diameter oftheking-bolt would operate to permit the bolster to shift in relation tothe axle, while at the same time the heads of the bolts securing theplates to their respective parts of the Wagon would be worn away and bedrawn out of place, while the secure attachment of these old plates from'shifting could not be had, as the excessive friction attending theiruse would cause a dragging of one plate on the other and cause theplates to wear the wood and become loose. These 'disadvantages arewholly overcome aud removed by myA improved wearthrough-its convexprojection b and bush d for forming the king-bolt hole'c, of about oneinch diameter. I prefer to make the chilled portion of said axle-plateabout twelve inches long by about iive inches wide at its middle oflength, and at the ends of said chilled portion is formed the transverserecess f for receiving clips g for securing said plates to the axle.

The bolster-plate D consists of a cast plate having its upper or faceside portion, a,made of chilled iron. Made central in the same is aconcave recess, b', bounded by an annular recessed step, c',corresponding in size and form with the projectionb and ring-step c,made with the axle-plate. The metal of said recesses b and c are also ofchilled iron. Made solid with said bolster-platc and with the sideopposite from the recess b' is the bush d. A central king-bolt hole, e',is provided,running through bush d and central with recess b', asshown.- Countersunk holesf are made in said vIO() and king-bolt will begreatly lessened.

bolster-plate for receiving bolts g for securing it to the bolter. Thesaid wear-plates are each secured to their respective parts ot' theWagonthe axle-plate C to axle A by clasps g, and the bolster-plate D tobolster b by bolts g', as shown-and the king bolt E'is inserted inplace, when the bolster Will be coupled with the axle.

In practice the convexity ot' the projection b and concavity of recess bwill operate to prevent sand or gritty substances from Working iubetween the king-bolt hole andthe kingbolt. The bushings d and dincrease the V'length ot the king-bolt holes, so as to greatly enlargethe extent ot' surface of the boresot' said holes, so that the Wear ot'the said holes The projecting step c of plate C and the recessed step cot' plate D operate to relieve the kingbolt E from Wear and transversestrain, and transfer the friction from the king-bolt to the largersurfaces of said steps. The bushings d and d operate Wit-h the recessesL and h in the Wood ofthe axle and bolster to relieve the clasps andattaching-bolts of strain. The chilled face side portions ofthe saidplate and their respective recesses and projections Operate together toreduce the frictional wear to a minimum, and prevent the reduction ofthe king-bolt hole from the upper side of the bol` v be secured to axleA, and having Wearing-face t a', convex projection b, and annular stepc, of chilled iron, and bush d, with king-bolt hole e, ofthebolster-plate D, adapted to be secured to axle B, and havingwearing-face a', concave recess b', and recessed annular step c', of

chilled iron, and bush d, with king-bolt hole c', adapted to be heldtogether by king-bolt E, passing through said bolster-plates, and axle,substantially as and tor the purposes set forth.

THOS. VAN AERNAM. Witnesses:

RICHARD P. DUMARY, ALEX. SELKIRK.

